At the end of his lecture at Harvard University, Ferran Adria gave his audience an exclusive sneak peek at the project he’s been working on since he closed the restaurant El Bulli last year: the Bullipedia.

In this joint lecture with Carles Tejedor at Harvard’s Food and Science Lectures, Chang has his audience play along with some bags, filled with fermented goodies like tamari and miso, that he hid underneath their seats.